Thanks for your question on Healthcare Magic. I can understand your concern. By your history and description, possibility of musculoskeletal pain is more. No need to worry for heart related chest pain as your detailed cardiac work up is normal. For tooth pain, get done clinical examination by dentist to rule out tooth diseases. Since you are working out, muscular pain is likely cause for your chest pain. So avoid heavyweight lifting and strenuous exercise. Avoid movements causing pain. Avoid bad postures in sleep. Apply warm water pad on affected areas. Take painkiller and muscle relaxant drugs. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.